And it didn't take long before she knew Urban was the one she wanted to grow her family and her future around.

"It was my (38th) birthday, and he stood outside with gardenias at 5 a.m. on my stoop in New York,” she remembered. "That is when I went, ‘This is the man I hope I get to marry.’"

Just one year later, that dream came true, and in two more years, they welcomed daughter Sunday Rose to the world. In 2010, another little girl, Faith, joined their family.

Nicole Kidman opened up to People magazine about her love for husband Keith Urban and the family they've created. People Magazine

But looking back now, Kidman can't help but wonder how big their brood might have been, if they'd had an earlier start.

"We go, 'Oh gosh, I wonder if we met when we were 25, then we could’ve had 10 of them!'" Kidman explained. "But Keith says, 'Stop the wanting mind.’ It’s far better to be completely in love and satiated with what you’ve been given, what we’ve been given."